How to choose the most appropriate images: 5 tips and strategies
Satellite images can be split into visible and infrared wavelength range. At night, no or few signals of the visible wavelength range can be received and the nightly cloud images are compiled based on the signals from the infrared wavelength range. Both wavelength regions also provide information about the clouds themselves, especially about the height and temperature. Therefore, it is interesting to create both separate and combined satellite imagery .
On the online cloud radar can be distinguished where the cloud areas are and where the sun shines. The images are made by satellite. During the day sunlight is reflected by clouds, so clouds and clearings are better seen on the images than at night. At night, the satellite uses heat measurements. The earth’s surface and the clouds give off heat. These measurements are converted to satellite imagery, but are therefore less sharp than the cloud radar of during the daytime.
Choose the most appropriate images:
Satellite imagery can show you how much a city changes, where slums are located, how many bushes you need to remove along your infrastructure network, how do you grow crops or where to place your masts.
To fully utilize the amount of information in a satellite image, consider the following 5 elements. We will help you with the correct answers.
Define the scale level
What is the size and shape of my area of interests?
The higher the spatial resolution, the smaller the size of the image. Satellites scan the earth’s surface, resulting in strips of footage that have a certain width. Some systems are designed to quickly capture large areas of the earth’s surface with a certain level of detail (for example, 1.5m resolution with a 60km recording width) while other systems are more suitable for zooming in small areas (for example, 30cm resolution With a shooting width of 13 km).
So it is important to check what the smallest landscape elements are that you want to distinguish in the image and what is the area of the area in which you have to work. By combining these two elements we will determine the most appropriate spatial resolution and we will limit the list of possible sensors, with which we will also charge the minimum orderable area for this choice.
Define the budget
Together with the other elements, your budget determines which sensors can afford a type of satellite imagery. It does not make sense to consider options that are too expensive. We will charge these limitations and propose the best solution taking into account your available budget.
